Belfast weather in August 2023

  • 18°C maximum daytime temperature in August in Belfast18
    18°C max day temperature
  • 5 hours of sunshine per day
  • 17 days with some rainfall in August in Belfast17
    17 days with some rainfall
  • 11°C minimum night-time temperature in August in Belfast11
    11°C min night temperature
  • 15 hours of daylight per day in August in Belfast15
    15 hours of daylight per day
  • No heat & humidity in August in Belfast0
    No heat & humidity
  • 89 mm monthly rainfall in August in Belfast89
    89 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in August in Belfast5
    5 (Moderate) UV index
  • 13°C sea temperature in August in Belfast13
    13°C sea temperature
  • Check out latest deals on flexible holidays in the UK
  • Fully refundable up to 7 days before arrival
  • Fully amendable up to 72 hours before arrival

Recommended for Northern Ireland

The August weather guide for Northern Ireland (Belfast) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

  • Top deals & discounts
  • Belfast weather overview
  • Belfast climate averages by month
  • More destinations
  • Best time to go to Belfast
  • Belfast 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about the UK

How hot is it in Belfast in August?

Daytime temperatures usually reach 18°C in Belfast in August, falling to 11°C at night.

How sunny is it in Belfast in August?

There are normally 5 hours of bright sunshine each day in Belfast in August - that's 32% of daylight hours.

How warm is the sea around Belfast in August?

The average sea temperature around Belfast in August is 13°C.

Does it rain in Belfast in August?

There are usually 17 days with some rain in Belfast in August and the average monthly rainfall is 89mm.

Belfast August sunrise & sunset times

Browse the sunrise and sunset times for Belfast in August 2023. Select a month to view Belfast sunrise and sunset times for the next 12 months.


Date Sunrise times Sunset times
Tuesday, 1st August 2023 05:34 21:25
Wednesday, 16th August 2023 06:01 20:54
Thursday, 31st August 2023 06:28 20:19

Related posts

Popular travel offers

Explore holidays in the sun for less

Top ^